电网运行环境下基于电热耦合潮流的架空线路应力预估  

Tension Prediction of Overhead Transmission Line Based on Electrothermal Coupling Power Flow in Operating Power Systems

作　　者：王孟夏[1] 韩学山[1] 韦志清 王明强[1] 张强 Wang Mengxia;Han Xueshan;Wei Zhiqing;Wang Mingqiang;Zhang Qiang(Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education,Shandong University,Jinan 250061 China;Yantai Power Supply Company of State Grid Shandong Electric Power Company,Yantai 264000 China;Shandong Electric Power Dispatching and Control Center,Jinan 250022 China)

机构地区：[1]电网智能化调度与控制教育部重点实验室(山东大学),济南250061 [2]国网山东省电力公司烟台供电公司,烟台264000 [3]山东电力调度控制中心,济南250022

出　　处：《电工技术学报》2019年第5期1078-1087,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51407111;51407106);国家重点基础研究发展计划(973计划)(2013CB228205)资助

摘　　要：架空导线的力学状态是决定其安全运行的关键因素,与导线的运行温度及所处的气象环境存在着密切关联。该文在电热耦合潮流计算中考虑架空线路沿线气象分布情况,并结合代表档距法将架空线路沿线各耐张段应力的计算融入到电热耦合潮流计算之中,在此基础上建立电网运行环境下架空线路各耐张段温度和应力的预估方法。该方法能够预估任意电网预想运行方式下架空线路耐张段的温度及应力,为从热、力学本质上分析架空线路的载荷能力及其安全运行提供支持。最后结合某地区电网,用算例验证了该方法的有效性。The tension of conductor, which is related to its operating temperature and weather conditions is an important factor that determines its transfer capability and security operation. In this paper, the meteorological distribution along the overhead transmission lines is considered in electrothermal coupling power flow calculation, and the inclined parabola state equation is utilized to calculate the temperatures and tensions of tensioning sections during the electro-thermal coupling process power flow calculation. By doing this, the distribution of temperature and tension of tensioning sections along the overhead lines under the anticipated operating scenarios of power systems can be predicted thus revealing the essential transfer capability of overhead lines. Finally, the validity of the proposed method is testified by case studies on a regional power grid.

关 键 词：电力系统 电热耦合潮流 架空输电线路 沿线气象分布 应力 

分 类 号：TM76[电气工程—电力系统及自动化]